invoice.java

来自「这个是JAVA方面的联系程序」· Java 代码 · 共 18 行

public class Invoice implements Payable {
	private String code; //发票编号
	private String remark; //说明
	private double unitPrice; //单价
	private int num; //购买数量
	
	public Invoice(String code, String remark, double unitPrice, int num) {
		this.code = code;
		this.remark = remark;
		this.unitPrice = unitPrice;
		this.num = num;
	}
	
	public  double getPayAmount(){
		return unitPrice * num;
	}
	
}